[Beowulf] ipoib routing

[Michael Di Domenico]

does anyone use linux based routers to get from an ipoib network out
onto a regular ethernet network?  if so, do you have multiple routers
or just one?  in the case of multiple routers how to you handle the
traffic coming back from the ethernet network?  (ie how does the
ethernet network know which router to send the data back through)

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to expand further on what i'm trying to do (sanity/success is still to
be determine)...

imagine a big cluster of machines all connected via infiniband running ipoib
there are 4 linux routers on the ipoib network that also have 10Gb
connections to an ethernet network
the ethernet network contains a router to other resources

what i want to accomplish is to have the compute nodes spray their
traffic across the 4 linux routers and end up on the ethernet network
i'm sure someone's done something like this before, but my google foo
is failing me